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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHM3_A/I
- Part No.:
- 1.5SMC39CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHM3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,984
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Product details
Overview
1.5SMC39CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC39CAHM3_A/I datasheet, 1.5SMC39CAHM3_A/I pinout, 1.5SMC39CAHM3_A/I application, or 1.5SMC39CAHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMC (DO-214AB) package details, clamping performance under surge conditions, and direct alternatives for design-in validation and supply continuity planning.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables rapid energy diversion without thermal runaway.
Rated for operation from –65 °C to +150 °C, it supports high-reliability automotive applications per AEC-Q101 (HM3 suffix), with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during ESD or lightning-induced surges |
| VC @ IPPM | 53.9 V at 27.8 A - Clamped voltage during 1500 W 10/1000 μs transient; protects downstream ICs rated ≤54 V |
| PPPM | 1500 W - Peak pulse power handling capacity; sustains repetitive 0.01% duty cycle surges without degradation |
| TJ max. | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments and high-ambient industrial settings |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports automated placement and reflow |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads; polarity unmarked for bidirectional configuration - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Handles severe lightning-induced surges (IEC 61000-4-5 Level 4) without failure when mounted per recommended 8.0 mm × 8.0 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes let-through voltage to protect 3.3 V/5 V/12 V logic and analog front-ends without overdesigning downstream filtering |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body control, and ADAS sensor modules requiring zero-defect field reliability |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free PCB assembly processes without pre-baking or special handling |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 μA) across temperature and lifetime - critical for low-power always-on circuits |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity during 12 V/24 V system transients up to 1500 W while meeting AEC-Q101 requirements for automotive grade deployment. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Fast-response TVS placed across channel terminals to suppress 10/1000 μs surges induced by relay coil de-energization. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by clamping to 53.9 V within <1 ns - compatible with 24 V DC control systems. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and RS-485 bus lines in network switches and base stations. IC Role / Device Role / Timing Role: Bidirectional clamp between VCC and GND to absorb common-mode transients coupled onto data/power pairs. Use Value: Enables compliance with IEC 61000-4-5 (10/700 μs) with minimal board space due to SMC footprint and no polarity constraints. |
Use Scenario: Input-stage overvoltage suppression in wall-mounted AC/DC adapters for smart home devices subjected to mains-borne surges. IC Role / Device Role / Timing Role: Primary-side TVS across bulk capacitor terminals to limit voltage spikes during brownout recovery or lightning coupling. Use Value: Withstands repeated 1500 W surges without parameter drift, extending adapter lifetime in regions with unstable grid infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), VC = 53.3 V at 11.8 A | Suitable for space-constrained consumer electronics where 1500 W capability is not required | Select when board area is limited and surge threat level is moderate (e.g., IEC 61000-4-2 ESD only) |
| 1.5KE39CA | Through-hole TO-218 package, same VWM/VBR/VC, but higher RθJA (60 °C/W) and manual assembly requirement | Used in legacy industrial power supplies where SMT is not feasible or thermal mass favors axial leaded construction | Choose for repair/refurbishment of existing through-hole designs or high-thermal-mass mounting scenarios |
Compared with 1.5SMC39CAHM3_A/I, SMBJ33CA offers reduced footprint but lower surge capacity, while 1.5KE39CA provides identical electrical protection in a through-hole format - making the former ideal for compact modern designs and the latter for serviceability or thermal-heavy applications.
Availability
1.5SMC39CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply, AEC-Q101 compliance, and repeatable 1500 W surge immunity.
Supply support for 1.5SMC39CAHM3_A/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for fast response, low clamping, and robust AEC-Q101 qualification in surface-mount form.
FAQ
What does the "HM3" suffix indicate in 1.5SMC39CAHM3_A/I?
The HM3 suffix in 1.5SMC39CAHM3_A/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification - confirming suitability for automotive applications including engine control units, ADAS sensors, and body electronics where material compliance and long-term reliability are mandatory. This distinguishes it from commercial-grade M3 or E3 variants.
Is 1.5SMC39CAHM3_A/I unidirectional or bidirectional?
1.5SMC39CAHM3_A/I is a bidirectional TVS diode, as confirmed by the "CA" designation in its part number. It provides symmetrical clamping in both polarities with identical VWM, VBR, and VC specifications - ideal for protecting AC-coupled lines, differential buses like RS-485, or any circuit where voltage reversal may occur during transients.
What is the maximum clamping voltage of 1.5SMC39CAHM3_A/I under surge conditions?
The maximum clamping voltage of 1.5SMC39CAHM3_A/I is 53.9 V, measured at its peak pulse current (IPPM) of 27.8 A using the standard 10/1000 μs waveform. This value is guaranteed across temperature and ensures protected circuits remain below critical overvoltage thresholds during worst-case surge events.
Does 1.5SMC39CAHM3_A/I require a heatsink for standard operation?
No, 1.5SMC39CAHM3_A/I does not require an external heatsink for transient suppression duty cycles (0.01 %). Its thermal resistance junction-to-ambient (RθJA) is 75 °C/W when mounted on the specified 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads - sufficient for pulsed operation. Continuous power dissipation is limited to 6.5 W at 50 °C ambient.
How does the "A/I" packaging code affect ordering of 1.5SMC39CAHM3_A/I?
The "A/I" in 1.5SMC39CAHM3_A/I specifies tape-and-reel packaging: "A" indicates the AEC-Q101 qualified variant (HM3), and "I" denotes 3500-unit reels on 13-inch diameter carriers - optimized for high-volume SMT production. This differs from "A/H", which uses 850-unit reels on 7-inch carriers for prototyping or low-volume builds.
1.5SMC39CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC39CAHM3_A/I FAQ
1.How can I place an order for 1.5SMC39CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHM3_A/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5SMC39CAHM3_A/I reliable?
The price and inventory of 1.5SMC39CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHM3_A/I?
1.5SMC39CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHM3_A/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5SMC39CAHM3_A/I?
For technical support, including 1.5SMC39CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC39CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHM3_A/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5SMC39CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHM3_A/I?
All 1.5SMC39CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHM3_A/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5SMC39CAHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHM3_A/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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